Abstract: A vanadium-based catalytic system including an activator substituted by multiple halogen atoms and a method for olefin polymerization are provided. The activator provided by the vanadium-based catalytic system is a halogenated ethyl phenylacetate substituted by at least two of the multiple halogen atoms. One of a phenyl position and a benzyl position of the halogenated ethyl phenylacetate is substituted by at least one of the multiple halogen atoms. The vanadium-based catalytic system is used for synthesizing the EPR, thereby improving an activity of copolymerization during the synthesizing, and reducing consumptions of a catalyst and a cocatalyst simultaneously, reducing residual amount of the catalyst and the cocatalyst in an obtained product rubber, reducing production cost, and making the product rubber post-treated easily.

Abstract: A polydentate organic ligand, a preparation method and an application method thereof, a metallo-supramolecular polymer and a preparation method thereof are provided. A structure of triphenylamine is combined with a structure of phenanthroline to serve as the polydentate organic ligand, which takes advantages of a large-volume distortion structure and excellent electroactivity of the triphenylamine. The polydentate organic ligands have good solubility, which provides lower-cost and diversified methods for preparing the metallo-supramolecular polymers. Meanwhile, the phenanthroline has a rigid structure and a conjugated large ? bond in its molecule, which facilitates chelating coordination with metal ions to form a stable compound. Therefore, the polydentate organic ligand enables the metallo-supramolecular polymer to have good transferability, stable electroactivity, and high conversion speed, i.e., fast response speed, excellent electrochromic cycling stability and long service lifetime.

Abstract: A polydentate organic ligand, a preparation method and an application method thereof, a mnetallo-supramolecular polymer and a preparation method thereof are provided. A structure of triphenylamine is combined with a structure of phenanthroline to serve as the polydentate organic ligand, which takes advantages of a large-volume distortion structure and excellent electroactivity of the triphenylamrine. The polydentate organic ligands have good solubility, which provides lower-cost and diversified methods for preparing the metallo-supramolecular polymers. Meanwhile, the phenanthroline has a rigid structure and a conjugated large ? bond in its molecule, which facilitates chelating coordination with metal ions to form a stable compound. Therefore, the polydentate organic ligand enables the metallo-supramolecular polymer to have good transferability, stable electroactivity, and high conversion speed, i.e., fast response speed, excellent electrochromic cycling stability and long service lifetime.

Abstract: A pulse width modulation (PWM) circuit and method are presented. The circuit has a switch for repeatedly coupling and decoupling a circuit element to a current source. The circuit also has feedback circuitry to detect a current flowing through the circuit element. The circuit also has a PWM generator to provide a digital signal to the switch and to adjust the digital signal in response to the detected current.

Abstract: A light emitting diode (LED) circuit for preventing parasitic current flow through a first LED when the first LED is in an off state is described, where the parasitic current flow is a result of one or more parasitic capacitances, the LED circuit comprising the first LED, and a first current switch coupled to the first LED and arranged to enable a current flow through the first LED when the first current switch is in an on state, where the first current switch is arranged to discharge the one or more parasitic capacitances when the first current switch is in the on state.

Abstract: A current regulator and a method for regulating a current flowing through a device such as a semiconductor light source is presented. The current regulator has a voltage controller coupled to a current steering circuit. The voltage controller is adapted to operate the current steering circuit in a linear mode.

Abstract: The present disclosure discloses a capacitive touch panel, including a substrate, wherein a first surface of the substrate includes a first region and a second region, and a second surface of the substrate includes a third region and a fourth region. A first group of drive lines is formed in the first region, a first group of sense lines is formed in the second region, a second group of the drive lines is formed in the third region, and a second group of the sense lines is formed in the fourth region. Each of the drive lines of the first group and the second group extends along a first direction from a periphery of the substrate to a middle of the substrate, with an end of said each drive line on the periphery of the substrate being connected to a drive chip.

Abstract: A method and an apparatus for charge recycling. The method is comprised of the steps of receiving a charge at an energy storage element from a parasitic component, storing the charge at the energy storage element, and providing the charge stored at the energy storage element to a power supply's input or output. The step of receiving the charge at the energy storage element includes operating a discharging switch to selectively couple the parasitic component with the energy storage element and receiving the charge at the energy storage element via the discharging switch when the energy storage element and the parasitic component are coupled.

Abstract: The present disclosure discloses a capacitive touch panel, including a substrate, wherein a first surface of the substrate includes a first region and a second region, and a second surface of the substrate includes a third region and a fourth region. A first group of drive lines is formed in the first region, a first group of sense lines is formed in the second region, a second group of the drive lines is formed in the third region, and a second group of the sense lines is formed in the fourth region. Each of the drive lines of the first group and the second group extends along a first direction from a periphery of the substrate to a middle of the substrate, with an end of said each drive line on the periphery of the substrate being connected to a drive chip.

Abstract: The present disclosure discloses a capacitive touch panel having two surfaces, each surface at least including a region with drive lines formed therein and a region with sense lines formed therein, wherein the regions on the two surfaces correspondingly coincide in a direction perpendicular to the surfaces. The multiple drive lines extend along a first direction, while the multiple sense lines extend along a second direction perpendicular to the first direction. An end of each drive line on the periphery of the substrate is connected to a drive chip, with the other end thereof left floating; an end of each sense line on the periphery of the substrate is connected to a sense chip, with the other end thereof left floating. The present disclosure substantially shortens the length of the drive/sense lines and the resistance.

Abstract: Embodiments provide a capacitive touch screen, including: an outer screen, having a driving unit array and a sensing unit array; an inner screen; and a connector connecting the outer screen to the inner screen. The connector includes at least one first surface connected to a surface of the outer screen, and at least one second surface connected to a surface of the inner screen. In a non-visible region of the outer screen, a plurality of electrode wires from the driving unit array or from the sensing unit array are divided into at least two groups, and the at least two groups of electrode wires are led out separately. The at least one first surface does not contact the plurality of electrode wires.

Abstract: A dimmer for dimming light emitted by a light source is presented. The dimmer includes a regulation switch for regulating a current flowing through the light source and a regulator circuit that provides an electronic parameter to control the regulation switch. The regulator circuit has a dimmer switch for passing or blocking the electronic parameter, and a signal generator generating a plurality of modulated signals configured to operate the regulator circuit in a first phase and in a second phase. In the first phase the regulation circuit maintains the electronic parameter to a target value. In the second phase the regulation circuit monitors a variation of the electronic parameter and maintains the electronic parameter to a predetermined value.

Abstract: A current regulator and a method for regulating a current flowing through a device such as a semiconductor light source is presented. The current regulator has a voltage controller coupled to a current steering circuit. The voltage controller is adapted to operate the current steering circuit in a linear mode.

Abstract: A pulse width modulation (PWM) circuit and method are presented. The circuit has a switch for repeatedly coupling and decoupling a circuit element to a current source. The circuit also has feedback circuitry to detect a current flowing through the circuit element. The circuit also has a PWM generator to provide a digital signal to the switch and to adjust the digital signal in response to the detected current.

Abstract: A method and an apparatus for charge recycling. The method is comprised of the steps of receiving a charge at an energy storage element from a parasitic component, storing the charge at the energy storage element, and providing the charge stored at the energy storage element to a power supply's input or output. The step of receiving the charge at the energy storage element includes operating a discharging switch to selectively couple the parasitic component with the energy storage element and receiving the charge at the energy storage element via the discharging switch when the energy storage element and the parasitic component are coupled.

Abstract: The present disclosure discloses a capacitive touch panel having two surfaces, each surface at least including a region with drive lines formed therein and a region with sense lines formed therein, wherein the regions on the two surfaces correspondingly coincide in a direction perpendicular to the surfaces. The multiple drive lines extend along a first direction, while the multiple sense lines extend along a second direction perpendicular to the first direction. An end of each drive line on the periphery of the substrate is connected to a drive chip, with the other end thereof left floating; an end of each sense line on the periphery of the substrate is connected to a sense chip, with the other end thereof left floating. The present disclosure substantially shortens the length of the drive/sense lines and the resistance.

Abstract: A light emitting diode (LED) circuit for preventing parasitic current flow through a first LED when the first LED is in an off state is described, where the parasitic current flow is a result of one or more parasitic capacitances, the LED circuit comprising the first LED, and a first current switch coupled to the first LED and arranged to enable a current flow through the first LED when the first current switch is in an on state, where the first current switch is arranged to discharge the one or more parasitic capacitances when the first current switch is in the on state.

Abstract: Embodiments provide a capacitive touch screen, including: an outer screen, having a driving unit array and a sensing unit array; an inner screen; and a connector connecting the outer screen to the inner screen. The connector includes at least one first surface connected to a surface of the outer screen, and at least one second surface connected to a surface of the inner screen. In a non-visible region of the outer screen, a plurality of electrode wires from the driving unit array or from the sensing unit array are divided into at least two groups, and the at least two groups of electrode wires are led out separately. The at least one first surface does not contact the plurality of electrode wires.

Abstract: The present invention relates to a square wave generator circuit, an integrated circuit, a DC/DC converter and an AC/DC converter.